feel free to answer any of these. i need the answer to the appropriate amount of significant figures on this pleasee

What is the name of this hydrocarbon?

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.